2481639 has 4 divisors (see below), whose sum is σ = 3308856. Its totient is φ = 1654424.

The previous prime is 2481629. The next prime is 2481641. The reversal of 2481639 is 9361842.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2481639 - 2¹⁵ = 2448871 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2481629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413604 + ... + 413609.

It is an arithmetic number, because the mean of its divisors is an integer number (827214).

2^2481639 is an apocalyptic number.

2481639 is a deficient number, since it is larger than the sum of its proper divisors (827217).

2481639 is an equidigital number, since it uses as much as digits as its factorization.

2481639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827216.

The product of its digits is 10368, while the sum is 33.

The square root of 2481639 is about 1575.3218718725. The cubic root of 2481639 is about 135.3878012584.

The spelling of 2481639 in words is "two million, four hundred eighty-one thousand, six hundred thirty-nine".